62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
package encoding
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import (
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"fmt"
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"math"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestFloat32(t *testing.T) {
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testVarFloat32(t, 0, []byte{0x00})
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testVarFloat32(t, 1, []byte{0x3F, 0x80})
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testVarFloat32(t, 25, []byte{0x41, 0xC8})
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testVarFloat32(t, -2, []byte{0xC0})
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testVarFloat32(t, 0.25, []byte{0x3E, 0x80})
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testVarFloat32(t, 0.375, []byte{0x3E, 0xC0})
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testVarFloat32(t, 12.375, []byte{0x41, 0x46})
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testVarFloat32(t, 68.123, []byte{0x42, 0x88, 0x3E, 0xFA})
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}
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func TestFloat64(t *testing.T) {
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testVarFloat64(t, 0, []byte{0x00})
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testVarFloat64(t, 1, []byte{0x3F, 0xF0})
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testVarFloat64(t, 2, []byte{0x40})
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testVarFloat64(t, 23, []byte{0x40, 0x37})
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testVarFloat64(t, -2, []byte{0xC0})
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testVarFloat64(t, 0.01171875, []byte{0x3F, 0x88})
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}
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func testVarFloat32(t *testing.T, value float32, bytes []byte) {
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var msg = fmt.Sprintf("tester %v (%X): %X", value, math.Float32bits(value), bytes)
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var size = SizeOfVarFloat32(value)
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assert.Equal(t, len(bytes), size, msg)
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buffer := make([]byte, len(bytes))
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codec := VarCodec{Size: size}
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assert.Nil(t, codec.EncodeVarFloat32(buffer, value), msg)
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assert.Equal(t, bytes, buffer, msg)
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var val float32
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codec = VarCodec{Size: len(bytes)}
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assert.Nil(t, codec.DecodeVarFloat32(bytes, &val), msg)
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assert.Equal(t, value, val, msg)
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}
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func testVarFloat64(t *testing.T, value float64, bytes []byte) {
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var msg = fmt.Sprintf("tester %v (%X): %X", value, math.Float64bits(value), bytes)
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var size = SizeOfVarFloat64(value)
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assert.Equal(t, len(bytes), size, msg)
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buffer := make([]byte, len(bytes))
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codec := VarCodec{Size: size}
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assert.Nil(t, codec.EncodeVarFloat64(buffer, value), msg)
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assert.Equal(t, bytes, buffer, msg)
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var val float64
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codec = VarCodec{Size: len(bytes)}
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assert.Nil(t, codec.DecodeVarFloat64(bytes, &val), msg)
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assert.Equal(t, value, val, msg)
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}
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